Rudolf berchtold



(No Model.) v

R. BEROHTOLD.

CUTTING DIE FOR WIRE NAIL MACHINES. No. 368,125. Patented Aug. 9,18'87.-

UNITED STATES PATENT rrrcn.

nnnonr nnnon'roLD, on NEW BRIGHTON, PENNSYLVANIA, ASSIGNOR .ro

w. r. TOWNSEND & 00., or SAME PLACE.

CUTTING-DIE FOR WIRE-NAIL MACHINES.

SPECIFICATION forming part of Letters Patent No. 368,125, dated August9, 1887. Application filed May 2, 1887. Serial No. 286,755. (No model.)

To aZZ whom it may concern:

Be it known that I, RUDOLF BERoHroLD, residing at New Brighton, in thecounty of Beaver and State of Pennsylvania, a citizen of the UnitedStates, have invented or discovered certain new and useful Improvementsin Outters for Wire-Nail Machines, of which improvements the followingis a specification.

The invention herein relates to certain im provements in cuttersemployed in wire-nail machines for severing the nails from the wirestock, and has for its object such a construction of the operative edgeof the cutters as will enable the cutters to simultaneously sever thenail from the wire and impart a wedge-shaped point to the severed nail,and will also facilitate the discharge or disengagement of the finishednail from the cutters.

In general terms, the invention consists in the construction andcombination of parts, substantially as hereinafter more fully describedand claimed.

In the accompanying drawings, forming a part of this specification,Figure 1 is a yiew, partlyin elevation and partly in section, of thecutters at the end of the cutting operation. Fig. 2 is a plan view ofthe cutters at the outward limit of their movement; Fig. 3 is an endelevation of the female cutter.

In the front or operative end of the female cutter 1 is formed a grooveor recess, 2, of a V width at one end alittleless than the diameter oneside of the nail-point.

of the nail to be formed. The side walls of the recess are inclinedoutwardly from one side of the cutter, thereby imparting a V-shapedappearance to the'recess, (see Fig. 3,) and the bottom of the recess isinclined inwardly, (see Fig. 1,) the angle of such inclinationcorresponding to the inclination to be imparted to This inclination orcutting away of the bottom of the recess form the cutting-edge 3.

The male cutter 4 is provided with a rib, 5, extending across itsoperative end, corresponding in shape to the contour of the groove 2,and adapted to fit snugly within said recess. At its narrow end the ribprojects from the block a distance equal to the depth of the groove inthe. female cutter at the narrow or cutting end r. 6., about half thediameter of the nail to be formed. (See Fig. 1.) The face of the rib isinclined inward from its narrow end at an angle equal to the'inclinationof the bottom of the recess, but in an opposite direction, (see Fig. 1,)thus forming a cutting-edge, 5, at the narrow end of the rib. As thecutters approach each other in operation the wire is forced into thegroove 2; but as said groove is at its narrowest end of less diameterthan the wire a wedge-like piece is sheared off from each side of thewire by the conjoint action of the edges of the groove and rib, thegreatest depth of cut being of course at the narrowest ends of the riband groove. As the cutters continue their inward movement thecutting-edges 3 and 5 are forced inwardly through the wire, and theinclined face of the rib and the bottom of the groove compress the sidesof the nail adjacent to the end and impart thereto the wedge-shapedpoint. (See Fig. 1.) This swaging or compressing action of the cutterscauses a slight elongation of the nail, as all lateral expansion isprevented by the sides of the groove. The rib and groove are made ofwidth less than the diameter of the wire at the cutting-edge for thepurpose of preventing an enlargement of the nail at its end whencompressed, and the inclination of the sides of the grooveprevents anytendency of the nail sticking in the groove on account of lateralexpansion under compression. In addition to shaping the ends of thenail, the force exert'ed'by the inclined face and bottom of the rib andgroove will shoot the nail out from the groove when severed from thewire.

I claim herein as my invention- 1. In a wire-nail machine, thecombination of cutter-block 1, having a transverse groove in itsoperative end, the bottom of said groove being inclined, thereby forminga cutting-edge and a swaging-face, and cutter-block 4., provided with arib or projection constructed to fit within the groove in the block 1and having its wall inclined, thereby forming a cutting-edge and aswaging-face, substantially as set forth.

2. In a wire-nail machine, the combination of cutter-block 1, having atransverse groove in its operative end, the sides and bottom of Intestimony whereof I have hereunto set said groove being inclined, asdescribed, and my hand.

cutter-block 4 provided with a rib or projecr 7 tion construct-ed to fitwithin the groove in the RUDOLF BEROITTOLD' block 1 and having its sideand front Walls \Vitnesses:

inclined, as described, substantially as set H. \V. WILDE, forth.

